To correct it, please try the following:
1. Get the free tool ShellExView:http://www.nirsoft.net/utils/shexview.html
2. Start it. If using Total Commander 32-bit (even on 64-bit Windows!), you need to get the 32-bit version, otherwise the 64-bit version of ShellExView. The 32-bit version needs to be called like this: shexview.exe /wow64
3. Sort the shell extensions by type
4. Disable all context menu shell extensions one by one (you can hide/keep those belonging to Windows, they are usually OK).
5. Continue until Total Commander stops crashing
6. Now you can re-enable the extensions which don't cause any problems

I've done what you asked and it made no difference. I've disabled 3 extensions I have and TC would still crash. But what I've noticed is that this crashing behaviour is repeatable. It happens only on Win10 upgraded from 1709 to 1803 not freshly installed. I've tried it on 3 different upgraded machines and on all of them TC crashed. On a win10 cleanly installed TC would just work fine.
Forgot to mention I'm on Win10 1803 Ent.